Leather manufacturing machine



1943- E. E. WINKLEY LEATHER MANUFACTURING MACHINE Filed July 23, 1941 7 Sheets-Sheet 1 Aug. 3, 1943.

E. E. WINKLEY 2,325,724 LEATHER MANUFACTURING- MAC HINE Filed July 23, 1941 7 Sheets-Sheet 2 1943- E. E. WINKLEY 2,325,724

LEATHER MANUFACTURING MACHINE Filed July 23, 1941 7 Sheets-Sheet 3 Fig.5.

Aug. 3, 1943;

E. I E. WINKLEY LEATHER MANUFACTURING MACHINE Filed July 23, 1941 7 Sheets-Sheet 5 Aug 1943. E, E. WINKLEY 2,325,724

LEATHER MANUFACTUR ING MACHINE Filed July'23, 1941 'r Sheets-Sheet e 25 qua D a QQQ Z06 Aug. 3, 1943. E. E. WINKLEY LEATHER MANUFACTURING MACHINE Fildduly 25, 1941 7 Sheets-Sheet 7 Pntente dA 8-3t1 94 3 1 1 I f n i 7 2 2 ED: AT A ENT FFICE s Lynn, Mass assi g-nor to United Shoe- Machinery Corporation, Fleming-' ton, N. J., corporation of New Jersey Application Jilly 23", 1941; Serial No. 403,595

'27 Claims; (owe-A6). invent" relates'tomaehines for .operg V insuring that-no portion ofthe workl ing' upon sheet; materiaisxich .as ;hides;and skins capes treatment H i i 3 While the invention is illustrated as embodied in V Intheillustrate mac 1 H g mac hinejor glazing tanned hides and skinsQ-it "is provided or determining thesequence of the istmbennderstoodthat theinventi s W 7' directly lateral and of the' iota tive moyen ents. v 011s important features-theme ma wqf the work ieeding deviee, the seid control mem 1 iicationsendflses. ber also determining thennmbe of such directly loy -inon et e ish tm l h in .T ss tool isre'ciproeated I feeding deyiceland ais s rotetivefi V h iece ltelfnat lyllfi 1o steps oi movements 9 the work piece by-the idleqaind work treating stokes, in n ermnge samework ieedingfievice. Through the Opt??- rnent in wl ichthe operatormust shiftthework tionof this cont ol member a wo k pi Di r e t y estrokesof th oq inor r inni eme h n n 9? h F fn-con tiguous areasor poi tions oi'thefwoi'k straight line while ate is v piecemay be successively treated, thei opera, ions :t in 9dr IiI f' u W I th t being carried outfuntiin all; rtioqs o f thqgjilen 1 letter vgr ill cbenshifted rotativeiy'wh il thelto ol is workpiece have 'received's bstantiall the same op xating onenother ortionuoi thewoik piece,

treatment. At the presenttizne,pbi'ushing,jgi,a i 2 ing, rolling, stoning, staking, a d whiten nia'-' a s chines employed in the treatxnentofj[armed of an a a by q fl i hides and skins comprise toolswhich are op'er the work piece to complete theotreatmefnt f the 1 ated inthe mannerjustdescribed' ltiollows same. a r L1 that nn ch m a nuai labor and considerable skill] 1 QO ently h y fi are involved, 'particuiarlyin glazing and staking one a o su ith the pr se t-,itybes' b mch ie Qbjeets of this invention are to inize the inanualtlebor and skill heretofore; required in v these and similar operations andto increase cor respondingly the output of the operator. These Objects have been 1 attained sincecthe operator may attend several of the'inacmnes-in a. given" time; due to improvements directed to automatic v v .o 1 Positioning and feed n o work pieces intro-n nsidevmfisa hwi YP m W ducedinsuccession in a ne of the machines a a mm @5959 1' ufliqe p e e by the optator; "5 1 ott q wor -P nd fg g u m 1 Since, in the treatment of hides and skins, the to e ra. Q 1 I he-S n thereby path of the toolshould vary :inits direction to latin he work ie condition i t suit the requirements of different portions of" D fl ti t 1 91 o w. ealch hid o rskin,;an importantieature" of the E- -9 Wportantfea re H invention iresides in the provision of means lfor '4 in slitting-the workpiece istep by step in fa directly lateral direction, thereby providing for treat ment or the work piece along successive :paths extending, foz jexample, in dir angles to the backbone line oit skin, the work positioning and mg =n'1eans becoming subsequently? operative" to shift the work piece rotatablyfabout a. center'i forepart'or the hind part oithe hid a p s l I worksuppoi't, and ilhisti'ating diagr am portions oi said hide or skin Ineach cesqthe the LsteD-byrstep manner in which th amount of. shifting movementis suchthateach ted in theillustrated machine; i successive pathpf the'tool overlapslthe pfeceding 'g. 4 1518. sideview ofvapg l a s s jpgtnpn the surfaceoiftheworl; piece, thereby 5 "t lever mechanism for'opei'etingot;

Fig. 5 is a detailed view. showing means for rotating work clamping members for shifting a I Fig. 8 is a detail view of part of the means for causing relative approaching movement of the I work clamping members;

Fig. 9 is a front view, and partlyin" vertical Fig. 11 is a view of a mechanical detail taken I along the line XI-XI of Fig. Fig. 12 is a view of a hydraulic detailutaken alongthe line XII-XII of Fig. 10;

Fig. 13 is a plan View, partly in sectiomof'the right end of'the machineshown inFig; lwith the uppermost lever arms; of Fig. remitted;

i Fig." 14- is asectional-view taken'along the "line XIV-XIV of Fig.*l;.;j f i Fig. '15 is asectionalview'talsen alongthe line Of Flg .;l'3';

Fig. 16 is a'view; partly insectionftakenalong the line xvn xvr of Figs; land 13;

"Fig. 171 detail'of t' e starting treadle' and connections; 1, Fig. l8 is adetail of a control mechanism for V the work clamping members showing a top plan view of the control member; V r v Fig. 19 is a sectional view along the lin'e XIX- XIX'ofFig; 18; g. y Fig. 26 is a sectional'vi w of the controlmem ber taken along the lineXX-'XX- of Fig:- -l9; s

' 'Fig. 21 is adetail view of partof the-means I l for causing directly lateral shifting of the were clamping members;

Fig. 22 is a detail view of part of the means for causing rotary movement of theworl; clampins m m e s za is a diagrammatic view giving details of fluid-operated means for'causing both rotative and directlylateral shifting of the work clamping membersan'd aIsoOffluid-Qperated means a for applying pressure to the glazing tool Fig. 241s a view similar to the showingof the skin in,'l ig. 3,indioating 'a somewhatldifferent I 7 method of treating the skin? 'Fig.'25 is'a View of a controller-member similar to the controller-member o'fFig; 18'; and Y Fig; 26 isa view oftheundensurface' of the controller member shown inFigx; y In the drawings, which disclose a machine specially designed to feed a workpiece during treat- 'ment by'a reciprocatory glazingtool, there are 1 eifect'ofgr-avit shaft and of the eccentric oi, the connecting 1 provided two pairs of work clamping members of which'the upper pair, comprising-clamping members-24- 2 6 =(Figs.6"and 7); have upwardly projecting portions mounted to 'turn rotatably in a hub member 28, while the lowerwork clamp- .ing members 30, 32" have downwardly projecting portions mounted torotate'within a'hub'member hub member -28 and that theworh -clamping 7 member '24 is seoured rigidly to the lower end K of a shaft 38 rotatable within the sleeve 36, and 7 that both the-sleeve 36-andthe shaft 38 areheld in proper relation to the hub member '28' by a collar 40 fastehed'to-the upper-end of the shaft 10 the axis of the shaft 38 (Fig. '7) and that they are also movable bodily in a straight line because H of their attachment to the slide member 44 I (Fig 6).- r

The lower work clamping members 353, 32 are rotatable about an axis passing vertically and pentrallythrough the hub member B l (Fig. 7). As shown, the work clamping member 32 has integral therewith a sleeve member 53 rotatable in'the hub member 34 while the workclamping member 30 is rigidly attached to a hollow shaft 52 'rotatably mounted withinthe sleeve 5%. Upon reference to*-Fig.-6 of thedrawings itwill beobserved that the-hub member t l is supported by an'arm 54 "which-is rigidly secured tothe hub memberM-and-toa slide member 55 slidably mounted-in guideways in a -fr'amefmember-til in .a manner similar in all respects to theslide' V member it and its mounting in the-frame members 46. From Van inspeetion of Figs. 6 ande'L 'it s willbe observed'that the two pairs of work 6194111131 .ing members ares-mounted 'for-rotativeimovement about the same vertical axispassingcentrally through the shafts'SS-anol 5! (Fig.7); Furtherp more, the two pairs of work claniping members may-be shifted in directly lateral directions by simultaneous movementof the two slide members 44.56 m means which will-hereinafter be ole- Upon reference to-Fig. 7

'0 be observed that the upper pair of work clamping members-FY26 are spaced from the lowerpair of work clamp -g oi worlz may be readily introduced between th .clamping'members, li leahs isprovided forcaus 11% relative 'approaehing movement of theupper "2; of the drawinga it will cl'ampa work' pieeeg-th'e means, in" the illusa ball ei rotatably mounted in a socket in said end, vthe said ball being provided for engage ment with an eccentric Sfirigidl.y-attached' to a shaftifit. At its upper end the connecting'rodtii is provided with ,a ball end which presses against a spring iii housed in thehollow shaft ;In;FlgS.-i6 and :7; :theiconnectingfrod ti! is in .cnntact 'withflthe low part. oftheeccentric .53

and 1 hence, the so, 22. ar in the wer work clamping n'ieinbjers lowermost position to the Upon a, half revolution oi the rodiie will moved upwai 1y itsfull distance thereb elevatingthe-low'er work clamping hembers; t2" yieldingly tonworlr clamping position with respect to apieceiof well; positioned between the upper and .loweiifwork. clan ping members. Itwill-be"understood of co sethat the elevation ofthe lowerwork ping memberstii; '32 takesfplace jin' to rotary] and straight line shifting movementsof the work clamping f mcmb ers i n their feeding operations u l pies V v tnis oonnection refero l 3 of the-drawings, wherein there'is'shown a shin-l2- with dash lines thereon to show the path'o'f a glazingtool 'M in its sue-l members so that apiece and lower pairs of work; members to members with acenterC of; the skinion the eerie 'tenline'oi a worksupp rting bed16. :Upon' starttherworkvpieceonestenabout'the centerID, the

: i ,work clamping; members miist separate and then. i

returninia clockwisedirection ito seize the Work in'gthemachine in operation}, the work clamping it members 'willcloseon the skin arid shiftithelat- -ter in successive stepstofthe left inwjFig. ,3fandbetween each feeding; ste ;the glazing; tool 14 makes an operative. stroke away, .from" the front f the machine whereby i thei said tool ccontactsr the skin "at orlnear thebackboneslinethereof and thenitravels toward theqmargin of theskin in a straight lines 1 Inthe illustrated skin, th efglazing tool: [4 v 4 makes ten'j strokes between successive "shiftings of the skin lZ inal, sttaightline toward the left ih1 ig. 13; wAt-the end ottherten shiiting a rend '0f{ which-is also-slottedto receive a roller j the center, D {of the skinhasreached thetoriginal position of thefcenter C; whereupon thest va ght line shifting means i'qritherwo rk clamping mern hers is discontinued; to be; folldw ed by rotative movements of the I work clamping. members to Y I withsthe rod..86, (Fig; :1), rod lflll being onnected ;at; its 'left-hand end 1H0 (Fig. 6) ;to, a lever l l2'- f pivoted at.;l Mjon'cthe frameof the machine, said i V lever; H2having ani upstanding pin- H6 lwhichfis,

15 in c "mounted ori avertical shaft H9 (Fig. 7), the other i as a preliminaryl to another.;feeding movement inJaL counterclockwise direction; L.

1gb. Thefiloweripair ofworkgclamping mernbers 30,

32 arerotated'atthesame time as the upper pair of work (clamping 1' members by connections; .to the lowerlever arm 8 4'(Figv10):',;saidconnections.

including: a connecting rod; l 09 (Fig.9) identical receivable"irruayslot, in ha bellcrank lever: Us

l 2nvpinnedito an ear on'ithe lower workclampingl rmembier 30. 7 It, will; be clear, therefore, that s the shift-theskinabout thecenter D,during which time the glazin tool 14 travels outward'in radial direction from thefc enterg D. At the 'end of eighteensuch rotativeshiftlnjgs of the skirii the.

' trotativemeansfor the"work- Sclamping mernbers becomes. inoperative and the skin: is again shifted ,v in a directly lateral directien so thatltheiftool I inoves alongi pathsfat right angles tQjt-hefbflfikbone line of the skin intil it; is time forthekin t0 b r0tative1y shift ed when it reaches the "camel-Ca '1 t .l v 1' For rotating ;the ,upper'mair of work; clamping v umembers,24,*26; there is prolvided means comprisirig'a. shaft8 0 (Figs. land; 10):, said shafthaving securedi-thereto upperifi djlowersleevesitteach j having rigidly secured thereto y a lever-arm: 84.

Tothe upperalever arm 84 is pivOteda connecting rodtBKF-ig; '1) pivoted at itsother endto alever 88: (Figs; 1, and :6) movable about'a vertical arm 98 secured to its-lower end; As shown; the

levervarm;98 hasa slotted or; forked end; H in which is 'jslidably received a roller on a pin 102 extending upwardly from an ear on the adjacent 5 1 work ,vclamping member 14-: 1 UP HY rocking lib l l shaft flfl in a clockwise direction ;(Fig. 1), the v iwolfkclamping rnember 24 is rotatedina counterclockwise direction (Fi s; 1 5 men. Move- 1 merit of the work rclamping member 24 in-thedia rectiorr liust mentioned results in' movement; of

v 1 the Q m i membe 26;;m hes ms3 mer;

.7 1 tion; duetoco npression of a jspring; I04 which 1 :is located betweentwoabutments lflfiloc ated, re-f v spectively; on the rear ends at the clamping rnein f H bers 24 andgze (Figs.;5 and 22 I h l movement of theworkclarnpingn rnberszi and f 26 :is accompanied by correspondingarotative l i movement of the work ;clamping members 3fl, ;3 2 by means laterdescribediherein, glflat the time.

i of thisrotative movement of the-work clamping members; the lower, members have ib eminoved I Otative Ff lowerworkclamping membersare given theisame rotary movement astheupper clampingmembers OIJQthintime andinextentm; l .l

1 fAibin' |24.-i s1set in hub 28 and extends into a limitisl'ot 125 injsleeve Iaiigto stop sleevefdfieata predetermined point ingth'e rotative movement of the twoyclalnping membersI 24, .261 while permit tingfzq'to continue for a distance beyond=;to put \tens ion on gjthef portion of the sheet material be- L tween .;the.clamping members, A similar arpivotipinllil landhaving atitsotherend alstud {-92 receivable ina.slot'inianam $tsecuredto v the upper; endof ashafpSlG (;F'igs.,5, 6 andQ'Z muunteddn a statidnary part of; the jrnachine rangenientis provided in thef-lower hub '34 and 3 le 5 r a indicated infigs. 1 and:10,;the vertical shaft B8 :is' given its rotative movements: by means of an; arm; I30, sec uredeto-isaid .shaft and having a egmerit'al rack l32 integr al therewith andfar n dli begconstantly inmeshwith ajrack bar i34j'integral witha piston :36 (Figs.-1 and 23) in v a cylinder 138;,1The piston I36 is conveniently' ;fluid -operated,' the pressure medium being introduced alternately into opposite-ends of the cylin-' fder l38- :by rneans ot a valveinchanisrn including as, cylinder lw (Fig.'f23) 58nd a double valvedevice I42 slidable'in the cylinder I alternately. to '-:open:p0rts leadingto opposite. ends of'the piston frame, the said shaft 96 havinga second'lever? cylinder I381 Forlmoving the valve memberjlfl win pppositedirections thereis pivotally attached toi -the onter end of the-valve stern I4 4, (Figs: 1' 4 Sand. 23) --one end of a valveoperating lever ldfi ,operated' in] a manner that will hereinafter be describeda-i Aslshown, thevalve stem I has a 4 springfl 45 surroundingdt between-a collar on the sternj and' the end :of t hecylinder M0 totend-rto v i maintain the valve'fin the position shown and w l to prventlost motioniu m i For reciprocating the slides videdsa pist n'ISO (Figs. 1, 10, 12 and 23) similar tdthepistoh 138, the said piston .150 bei'ngslidable in iaic ylinder i152 andhaving a' rack bar I54 in -mesh swithfa segmental rack I56 on' a lever arm l iISBysecnred-Vtothelower endof a vertical shaft lfipiwhich carriessecured thereto two sleeves 1 62, i I 64 (Fig.110-) each having fixedly secured thereto an arm-L I66 to the; outer end-of each of which is j pivoted-a connecting rod I 68 (FigsflI and 210). To-the o'ther endsof each ottheconnejcting rods: h58 is pivoted one e ndWofHalever I10 rotatable about anargisj I2, rsaid -lever" Ill! havingapivotedto its opposite end a link M in turn pivotedlto one o f the; two slideix'nembers 4 4 lor156, In Figwl iW- It wil a b i irstooq theiset on similar. V parts; jcr :pperating thQjlQWell gslide l i iF-igdfil j in WI ibe'ronnd directlmunderthe parts, 168, i l 10 and v v 'u and SBQtherehy to move 1 the giwork" clampingsmemhers 2 back and forth injdirectly lateral directions, there. is proheoessity' :for

that thesliole members #4 v and- S'i'are reoiproe ated together upon rocking movement of the vertioal shaft I80 produced'by reciprooationof thepiston I 59 in the cylinder 15% During movementiot the 'slidelnehibers 44 hind 56- t'o the lertdn'Fig. 1 the lower pair of clamp members 30:,"32-v'vi1lbe held in an upper Work'olamping' position by the *eooentric [64 (Fig-"7) i Hence, during this movement o'f-the clamp members to-fthe leftih Fi'g. 1, the ISkin- :is mov'ed one step to the Cleft bystreight 'lin'e shifting'of'the clamping members. "At the fend of this movement the clamping members are separated, 'thel'ower work clamping members 30, 3 32 moving downward by gravity-, during :retatioh "of the eccentric '64, un'tii"they'reachtheirlowest 7 m mes; 1enr110 esindiated in Fig. 11 which is atviewbelow the level of the skin; It'foflow-s V work olampihg devices in both the idle and oper- V ati've strokes thereof. the other hand, when the "skin has been: moved in 2, directl lateral direction step byzstepluhtilthe center 'D reaches the point previol'rsly occupied'hy center C in Fig. '3; the -sidewise shiftihg ofethel Workclamping "devices is terminated-land the rotativeimovemeht or the x'v'drk clamping device is begun to move the skin'5step by step about the center D.

position showh inhigs. Sand 7; Then the work 'c'lampihg memb'ers aremoved directly to theright in 1 in theirrseparated- 'coridi'tionfih order to of the idle movement-the loWerf-work hla'mpin'g members are againmoved upwardly to clamp the work: piece, aft'er' which the operative stroke o'r' movement ofthe-clamping members takes piece Y orrce more to theleft (Figs-1 an'd 'B);

V Reoipro'catory movement's of the hflstoii We in the e'yimde'r are-oa-u'sed by' ajdin-ittihga pressurej medir m alternately to' oppes'iteehisof the e cylinder- 4452 (Fig.+23)', c0i1tro1- or 'trie pressu'r medium being secured by operation ofQa flouble valve membeelto "in a; valve cylinder 4-82 h poh movement o'r the "valve member i3o byegvalve operating lever- 184* (Fig-. 1)" i' iv'0tedto valve stem 186 or the valve member iEOy-Iafshiihg 18? being providedto tend to mamteinfth valve fin the position shew'n 'in Fig. 23.

V ,v '20 take a Tresh-gripof the workpiece. At the-end j in the illustrated construction; the top surface "of" the'oontroller-disk 2% is provided with twenty passageways between the stud s or 'teethZQB to ive ten directiy sidewise movementsto the skin sated by thelihes passihg at right angles to thehackbone line of-the skin in Fig. 3, while on-the under sideofth'e same diskthe passagewere; 2640;; thirty six in number (this exact numher not shown sinoe too muoh reduction in size of passageways would-be neoessary), providefor th rotetivem'ovemerit of the work clamping device'gto move the skin F2 "rotatively 'foreighteen 's'tepsabdiit the ehter D." It will be tinderstood, of 'course, thet th'e'number of directly lateral steps during whi'c-h the glazing tool travels along rhe'chihe I V 'd p artiula'rly for" the o ontroller disk 29);

p'a'thsjat right'az igles tojthie backbone line-W -preferab1 7 vary with different fsi'zesof skins and l hence the skin'sshoulldbe sorted to present batche 0f; skins of about the same size for the onst'ructed as shown in the drawings,

Z-z'owvr; if the niiniber "of Steps 0f directly lateral movement o'f'th work pieee be suited exact- Pressure-medium under" pres'surei's supplied to both the-valve cylinders i il arid' lm throlilgh a pipe tee (Figr 23) connected to apum 'lez operated a, motor 194, there being a return pipe 195 which ope sinto' the lower part of the reservoirwal r V For controlling; both the rotative' ar d straight line movements of the work clamping z'r'ienibei's, 7 there is provided+a o0httolling rx'ie'ehahis'hi of which the most important member is a controller cured; to a vertical: shaft- 29L This controller disk 28%? hasian upwerdly racing surface provideo with controller grooves 282, and controller passageways 254 (Eg -18): On its lower-face ('Fig. 2G) the Controller d k 200 "has Corresponding controller groove ZQZa 'and oontroller pas "segeway zfia, thegrooveftfiz "in 'the upper face directly above "the "group of passageways 2 3M inthe lowerface of'th'e disk. Uporiflirispectiiin "of Figs. 18, 19' and 20," itWil-l'be observed that: the I fissagewaysifl, 12am pass laterally f l back and forth between suceessive teeth or projections 285 or' fitta'. I A piri zfiii ih a lever hr'fn 2H3" (Fig. 18) travels "along -the groove 252- in V the upper race of the-eoritrollerdisk 20B 'vvhile a, pin Zeta-in 'a'lever erm 212 (Fig; 2ill ismovihg i and more clamp retativ de- 1y to e skin of a given size, it would make no greet '"'ifference' if a skin 'som'ewhatshorter or longer, albh'g -the ha okbon e line, be shifted to rotate about a center-moire end of the skin which ts thesatne olisi'zairrc'e from the transverse median line" of the skin- ?s that shownin Fig. '3, provided 7 ohly thatall porti'ohs' Ofmerger skin are Within the'renge of hiove fer rt' ofthe' tool and hence receive treatment "Fora batoh of considerably larger ski'n's, it will be desirable to provide a idifier'ent arrangement 'of controller i grooves and mssaeeways m a controller-disk whioh maybe reztflilyisuhstit'utedforthat shown in the ma- 'ch i-ne.'"

in order that'the "controllerdisk"Ethfmay oon- 'tro-l the operfatidn-of the valve-pistons MZ'and 88 in thevalvecylind'e'rs Me and H32, respecrtjivelyjther e-is provided a "yielding" connecting themes which vafill no-W bedescribecl; Upon refer- 21.68 130F195. 1, 13, 14, 15 and. 15' it Will beo'b- "Se Ved that a driving shaft ZEFIFigs. 1 and 13) ,heih'g shchthat the clutch member 22545 moved 'hsvihg a 'elutch member 222 secured thereto is? arr ed in'l ih *xvithasha ft fifie'having a coope iting'ficlutch memher 226, the arrangement *irito engagement with the "clutch rhemberi ttate the shaftit' carries-fixedlysecured to its other atecli in" th direction by: a spr ihg "is slidableaohshaft 22a but iskeyed to rothee'vvltl'r, will be deseribed hereinafter inmate "detail.

the 'filhstrz ttedconstruction,

ehden eooentrie or cam member 233 rotating in afyo'kig'fZSZ-to;which'are seoured aimirof shafts 234, "2-36 I (Egg-15% *611 the shaft there is provided-a collar -238=br1 each side of which are s rmgs aseg the result being that'the collar 2% "is rhove'ii -:yie1di ng2y ba'ek and forth during the reciprocation of the yo'ke 232- by therein 233 'h showh; the -col lelr 239 has extending" 1h oppositedire'etions therefroma pair of pins'2fi2 which I r with the jr esh'l't that the shaft fitisdriven fremthe shaft itbeihg understood that theclutoh member 7 operation of "the piston l361 (Fig hers in straight line feeding of the skin ing since thecontrollerntdislg 2001s mo rate toperihit passage of the pin 20B from'side to side "of the rowof teeth 206; When pi 01 which is' pinned th lever-arm 212*(Fi 9 t and 20) having its pinZUBa forengagement alternately with the controller grooves and controller passagewaysin the lower face of thecontro er disk zoo; i Inf' the illustrated e yoke membe 244 is integral Wlt a sleeve 25l xedly= SW 1? ed, thereto" v the valve operating lever 1|46KWhich controls the and 23)]for (Figs. 9 arid14)" havin 1 The otherjhaftfifi;tFigs i lfiand 1 8) ex-' from the yoke member 232(Fig, 15) has a co1lar260 having pins 262 projecting in opposite directions therefrom for engagement with sleeve 8 having secured thereto thefleve'r rm .Ithe controller" disk 200;"The0ther yoke rn the work clanrping devices are given.straightline l reciprocations togrnove the skin12 step by step in directlyuateral movements, as indicatedin "Figi 3 of the drawings.

It will he understood ithat the apld vi onof the lever arms 2 lo and z I 2' by the yielding means xnprising the yoke member j232, and the shafts 1rd 236 through the yieldihgly connected co1"-- "238 and 260, will cause the pin" 208101 e etween the teeth 206:

(mg the passageway 204 matter described. =While'the pin 208 is vgroove 202 (Fig. 18) the 'vi T theatre 232 ai'e yieldingly wider groove to the other,"pesslhg between adinitted to rnove the valve Ito alternately'in op posite directions to operateithe lclampingmerm m I "will 60 be understood that'engagementf of tli in 208 with a, tooth" 206 isi only temporary andjield-Q 7 ngata is in a groove "204 (Fig/18)" the pm 7208;: isih a sirnple curved groove. 202q and whenjpinq2ll8q "fentersa'group ofpassa g evvays 204a to perate 1 the valve member I to causerotativ'ej movement of the work clamping members, the pin'208 T is in a simple curved groove 2ll2jn" the upper sure face of the controller member 200. l the operation of the mean for glvin tion rotative or straight line movements of the workclampingmeansissecuredina manner to 75 8) the latter carrving the pin 20 r l movementalongthe grooves 202 and *alternat y through; the passageways'20 fl-in the upperfiace I urlng rotationotthe controllerqisk ZUI I'Which 'ls'driven at ap'redeterxmned rategaswilljhe herea similar. arm is forth e e a 325724 y 5 c arefrv jceivahle in the forkedand slotted end of I overlapping yoke members2 4 l 246 (Fig. 14) the yokelmember 245 beingse cured toa sleeve 248 r j pinned to a vertical shaft 250 to thelower end prcleterrnine the'numbe'r of therotative and the number (it thestrai ght line shifting movements of j the work clampin' members and in' order to 'secure step-'by-step'n ovement or the skin inplace beneaththe 'glazing tool in a: manner-[to insure PIOP bribed, interengaggirlg :elutch members 222 nd 22 n which" are normally "out of engagement worm ear 28'0has oi)erated to move the part disengaging position. As shown,

he movable clutch {member 226. Hence,

hesleeve228, on the-shaft 292 ismoved V to the left'ih Fig. 13 through engagement of the i stop '286 WiththearmZ'fiE of the=said sleeve 228,

the movable clutch Lrnember 22B is moved away fr m the 20 'has' securedthereto an u ley 30B belt 302 the other end of 1 a m' pul er/,3 P l the, meme;

rarne; Bill .1 11! 3 [8 being pivotallv lowe end-Ito the "treadle and at 20 rigidlysecured to a l H ahearing 324' (Fig. 13) se ur a Li v tending between he cuter endof the arrnj 3 2l'l and a bar '328, the arrangement f the treadle 3" re,-

H o one-en of hi hanism of the machinegin oneration.

I heretofdrestated, t I

rid 1?ig .23 is movable'backr and 16 lwhic supports that portion at th instant against he machine is atrestfas indicated in Fig. 13 this top plan viewrof theparts'under dis-1 ussiomfa ston InemberZBG onthe. upper surface .13; the treadle andliftlng of {the m 2 88 is Iollowed by engagement tof theclutchn rts 222;226, thus starting theworkfeeding lazing tool 'lllFig s. 1

hwn, the glazing tool it. one step end men. to, hold,

ehd lot, a; corinectiog r oql 341 the other end of hichis connected to a crankl ini 343 91 the driven wheel 345 ,As t llurs lfatfi t. i fi memb semis ivcteaat stz ig- 2 3) tothe IQWBIT- end 6f e le e m b 3% eiv ells mounted at it upper e dor the'ireme oi the machin by a. lihk member attend: also pivoteHy-mmfifid a leinq nthe w en ts, nds b {a link} emher W Tpivotediet 353- to a leyel 352 movable epoilt a H isicar-ried by a. member 3413 at the lorwa m .s 7 im fiivot 3 54 carried by th e machine frame. At its i other end, the lever 35g'lisfpivotall y connected bye, link fiewith a .pifitoh 1:0(1358; rigid with a. istes-etc htexis the er end of the: cyiincer' 36Zthe1reby sismgshe pistjoplfi fiii'and ce usir g, through the linkage describedfpi essure to be" exerteq in a downward dii ectionuponthe tool 14 so that, the

m a piston cylind r-36%: Whenth Hmch ne a ted in {Operationby the depres iatt'enwi-ll 'be eifective as asgle zi og tool While it isbeir g; ITGQ IDIOQatBG. It will-he oted thetpressure th'u suapplied i to/th tool'flll is. ell-yielding ,pressurei'byreason o: the nature of the fluid pressure: medium which 4 exerts the pigessm Wh'e'reas in the ordinarycemriletcial lazi me- Qchilie, the beds which-supports the Work piece against the thrust of'the, toolisqyieldix g merriber, in. r the; present construction. 7 it is. theitool that exerts the pressure yieldinglytor the mason thatfth'eibed. iii should be statiorie y-ihol dep to simplify the construction of the wo slamm ng members 2 fl ndr V 1Y 1Q- Q Q P 1 Q which mo /es. u ward-1y pife ss the work piee e egajinst thelupper pair of; Work cia ntping'm em vb ers 24,. 2-6 to erigag 'eflthe workpieee arid to move 0, ,ei"2ttes or ei'portio of the vlv o piece, exposed between thework clampinsmembelisi r In orderthztt -pressure' willhe, applied tothe tool M by bre'ss r'e medium introducai into} the cylinder v36,2 onl'y. when-the machine; is to, opegete mm W' k v ew h r s-mov e l ez el e ce istruc'tior comprisihg: a, valve.- c ylihdexf; 3 0 691;-

tainingh double val-ye memlee p flk, said alve; 'memb t hav ea on rock 11 ec d etit outer end to an arm 31'B"(Figs;- L and? igid V with the sleeve membeylm whioh in-cop ecctiohw'ithfthe st pzzas-and f jclutlch -vcontr o11ing em er; ashdescxgfldeci Kath .When-the, sleeve 228- moves mm its ppsi on in H1 88 s e eh if; diseneaeme .l eism m to the posit I -shown in Fig. i where.theclutchpaptswe eng ed thle arm 31%.on the sleeve 22 8causesi n'iov v ent of the vaivemember. 312 to the right, ir lflig 3, with the result that pr ssure. m diumiunde p z s' f passes from the pump is; through a pipe 3M; to the middle g-p'a rt; 0f the cylin dely 31G and titer-ice i by pipe fiiizrto the'lower'ei d iof the piston c3111}:- 1

2352 whereby upwalrdmoivement of the. piston "3 56 is produced, such upward movemeht-caiising the eppiicationof pressure, upon the glazirigtool' V'lfl; through thelihkag'e above described.- Qn, the

7 oth'e hahdQat theend offohe. complete rotation V of the worfii gem. ZBBJFigs 1 and 13) when the tbh member ZfiQengaigEs t,

thejsleeve 2213.- eind. causes movement ofthe sile'eve to; the left from its. positioh'l in Figs. 1r md 2131 to its DQsitioInin i 13 the a v m mb -@111 moved. to, the, left Fig.1 2.3. Whe eby pressure h e t e $90.

pe itien ie s i betwe he 1 1 12 t tv 25 0 work clamping. members, and the :lower set St,

3.2 with thebody; o tl fi skin resting upon the V diViQedLWOrktabIe-H andwithe.portion of the skin resting upon the bed 16, a center C in the i k b in n lly. switch d; substent lltin the median li eof thebed esizicticates}; in; s li -m dent jsine e need e-i 1 e me m stems in operetimt; W WQ k 1. 2 m s f thework clam ing members,- ehd: heldwhile the. gla g t o makes i s :QP re et me Bef ore 'the next stroke of the. tool, the clampin iempersimove laterally tov the right in 3 V one,- fresh portion-oi theworkpiece and 7 tl' ery11lovebeck cov the left inEig. 3" t -:pesit io close.

a. fresh porjtioh of- UieWork piecefor treatment by the lazing tool. This dire tly lateral-- mcteme t. of them workpi ece is contihued tmtil the cezime r Dg in, the skid reaches the position origirially occupied by the center C. A this time theicontrol' member 2%, shifts one one from the sidewiseushiiti gv mechanism for the work clamping members. tothe roteltive meohanismitor sg gi drmeixgbers, the result being that theskm'is given-a; step-bys ep movement. about 7 the center the. glazing tool operating elongpeths extending; outwardly .radia'lly'from thecenterD; until the skin has been turned thxou'ghsulosta tie il-y lfiflfivlhexeupqn the: directly; sidewis'e, movement Qf,,.the resumect thljoiigh control mec lg a of which the .most i tant element is the Qontiiol member 11. This is: continued u til the is; again positioned,- with the center C 3; line, .withthe. tigansyerse center of; thei-tool m,

as in 3., whereupon the ro tative: meyement of the work clampingfmembers is; resumed cont iolof; the control member 2%, such-sot 11 0 menyoverlaphing strokes of h QR-Zin to Q11 hqse portions, Ofthe 5km adjacent to, the

,m m ri id with medium is shut off 7 f romlthe. pipe 3,812 and con- 7 mate to. a pipe 38,41Which -1uhs to the upper 16nd of. the. piston cylinder 362., the result being Po n s C, D, provision isrmade. for substituting A q he cmt h mbe ee g 41 j 18 enclfifi). a controller member 38!, (Figs. 25 a Q26). In this ces ethe skin 38 3x5011 be placed ugonjthe Wonk support 5.5 (Fig, 3.) with a center above the lo gituclinei median-line of the work suppoxting bed 16., Uponstarting the machine, he, contr l r membe tl tur i n he r tion of; the arrow in Fig, 25.. will effect through the. connections abovev described, including: the

l ve etmltlijwith it n -Z hiting 0f the worlsclamping members back and forth in c 1i rectly latexal directions to mQV-ethe skin 353 stephy step to the. left in'Eig. 2.4 through six steps during: which therglcjzing tool travelszin tl ms at right; angles tothe backbone line. The ix t p rmen oe d abo r de hgtthe twelye. passageways. invtheigr oup-pot pas? Y 7-5 sag ewoysifi Whilethepin Zfitinithe d ed with co nections opening into 6&Chi62'id' valve'chamber S'Iihto. serve as e, return movement -.-of the work v clamping m mbt s bm 12.11% I V continged, until the skin has been ag a i turned Lll llbs em l 1 0i eh out th 7 c nter; G. wh r byrotatably was out of operation. Howeverfat of =the-glazing-tooh "It' is expected; therefore; that the output of a-given operator will be great-- ly increased and this; without any deterioration inthequality of work performedf the end ofthesixth stepof directly lateral ing of the skin 383, the centerFln the'skin reaches-the pointpreviously occupiedby the center E and at-the" sameitime {the pin [208a,

i Having described my invention, win-it .1 claim asnew and desircto secure by Letters Patent of the United States is:-

L In'a machine for operating upon sheet ma terial havinga tool movable over the surface of a. work piece, :the'combination of a workfengage ing device; meansautomatically/operative to causesaidwork engaging-device to shift the work I enters ;-the *back-and-forth passageway 388 "in I i the bottom of thecontrollermember :38 l'fwhile. at the sametime thepin 2fl8senters-thenarrow face for "the ontrolle rrgmember. Hence; the n-y shifting meansfis operative and controlsshiftdirectly lateral steps 'rnu be ea I 5 to s: memsive in Eig.-24) askdeterminedby the pin 208 on thea rm 2H1 traveling through the back-and while th e pin sentersf the backand forth group of passageways 395" (Fig; -26)" to control the rotativei shiftings or the work clamping I 'rectly-lateralshiftingmeans' forthe work clainp- 'ing members 1 is inoperative 'while the rotative ing of the sk infwfthrough"eight rotative steps, about the "centerj -Fu lisffoilowed by four piecepthe combination of a work support, awork piece, for a.predetermined-number of steps in a straight line direction while-treating onef portion i of 'the work piece and means operating in timed relation to the first-mentioned means to I cause step by steprotationj of saldwworls piece abo'ut a another portion of the work piece."

given center therein -whil'e the tool is treating terial havingatdolmovable alternatelyin idle and operative strokes over the surface of a work engaging device having work engaging surfaces oneachside of said work support, means; automaticaliy" operative to cause 'said work engaging .members by, which the skin; is turned about the i centenGp Subsequently-the skin is shiftedin :2. directly *lateral di r'ec tionth'rough six steps I while the glazing toolmakes strokes on t-he sur faceofthe skin in directions at right-angles to the backbone line, at which time the skin reaches I 1 a pointwhere'the center H occupies-thexplace juetpreviously occupie'dby the center G. There cfollowsa rotative 'shiftingabout 'thecehter H; four lateralshiftings between the centers H and E and a final rotative'shiftingabout the"center ;E to, complete the treatment of the" skin. "In view of the disclosure of the-types of -'contro1ler mam bers Figs! 18; and2 0" and in' Figsi1-25 and '26} it "will be clear that a controller member maybe provided similars to the jcontroller memberQZM e to efiect bodilyimovement of the work engaging a I V I I I I t j a predetermined number of steps in a directly or 331:, whichwill so control the. work clamping members that any dsirable'fpattrn of strokes of theglazingtbol ori tlfie of may i n will-'i be sen muse spans; ischarged ticularlv thelocation of the first Center device to shift the work piece 'for *a' predetermined number of steps ma directly lateral di rection and "in uernanmw m the operative strokes of the "tool while treating one portion of the work piece; means tocause step bystep rotation ofj'the work piece about a given center in I the workpiece while the tool is treating another portion. of the work piece, 'and'power' means to operate-the 'tWoiirst-mentioned means in timed relation to each other. is

3; Ina machine forfcperati ng upon sheet mae terial having "a toolrnovable over the surfaceof a work piece,- thecombination of a worksuppo'rt, awork engaging device movableic shiftthe work piece between successive operating movements of the tool, said device having work engaging surfaces on eachsideofsaidwork support, means device to cause shifting of the work piecefor lateral direction and-then rotative shifting of said work piece for a predeterminednumben of steps rotatably about a given center in'the workfpie'ce,

and rneans operating in timedrelation to' the first-mentioned means is cause said device to I a with the duty r lacing thesl ining 'cne rnachinei I ina.correctposition-fit being obviousfthat; rom:

the practical standli oint; a certain amount 5 of Judgment must be exercised indetermining ps1. c [(Fig. 3) or (Fig.,2 4) jTri .cperamnmowe-er; will undoubtedly be fprovidcdffor glazing"operation Since the operator is charged rnerelvwith'the "duty of introducin and removing skins from a"'g1ven machine, itfis expense that he will be able to look after "a number of 'these "ma.chinesli whereas in the cas of glazingl machinesnow commonly provided-in the industry an operator I can attend any; one 1 machine and rinust give 1 a grcat'deal of time and effort to themanuals'hift ing of the work piece 1b'etween successivestrokes work engaging tension that portionof the work, between said 'surfacesfduring operation ofthe V.

toolthreonuf v II 4. In a machine foroperating upon sheet" ma terial havintfltool"movableover the surface of a work piece-the combination of a work clamping device comprising an upper and a lower clampingmember for engaging opposite surfaces of "the work; piece, means for causing the clamping members I to engage agwork piece 'on opposite su rfaces thereof, and means operatingintimed relationi to [the first-mentioned. means to move the clamping'membersbackand forth in a straight-line directionbetween successive strokes of the tooland then itomo've asa, unitrotatablY about a given center in the workpieceand-ah temately inidle and workfeedingmovements workpiece; I i t 5. In a. machine-for operating upon sheet Inasecure treatrnentvof anotherportion of the terial having a tool movable alternately ,inidle and operative strokes over the surface of 3, work piece, the combination ofw orkfclamping devices I spaced*fr0m'*eachother-a} distance correspond- 2': In a, machine-for operatingupon shet'maing substantiallvrto the, Width of said tool, as

devices including upper and lower clamping mem- V and means operating in timed relation tothe firstmen eneo m ans to ove-zin c ampi members bodily back-and forth to feed the work piece between successive strokes of the tool and h n 7 o m a a 1 nit 0te eb1v a u a given center the work piece alternately inidle :and

work feeding movements to secure treatment of a another portion of the work; pieces V 6; In a machine foeopereting uponsheetmae terial a tool, movableover thesurf ace of a work iecetr nat ona a e f f u p to back a portionirof therwork piece againstithe' thrust of the tool, work-clampingdeviceslocated upon both sides ofthe. work support and vmovaloie t ftthe k iec over the surfaceof the work support. between successive operating move-e ments of the tool; said clalnping'devices being operative'to', hold the workpiece against dise placement by said tool during the operative strokes of the latter, and, means to cause bodily movement of the workclamping device to effect shiftingof' the work piece for-a predetermined number of steps to feed the w0rk piece in a directly laterally direction and then to effect ro-. tative shifting- 0f the clamping device to cause feeding of the workpiecefor a predetermined number of steps rotatably about a given center in thework piecei I g a 7 '7. In a machinefor, operating upon sheet material having a tool movable over the surfaceof a, work piece, the combination ofa work engaging; member movable to shift the work piece between successiveoperating-movements; of the tool,

power-operated means for moving the work en. gaghag member rectilinearly and also, angularly,

and mechanism for controlling the p=ower-operated means arranged to determine the number of rectilinear and angular mo-vements to be impartedto the work engagingmember in operat: ing upondifferent portions of the work piece.

8. In a machine for operating upon; sheet ma terial having a tooLm-ovable overthesurface of awork piece, the combination of a ,work support,

a, work feeding device movable to shift the work piecetever the work supportbetween successive operating movementsof the tool, power-operated means for moving the work feeding device; rec-,-

I tilinearly and also angularly, and mechanism for controlling the power-operatedmeans arranged V 'todetermine the number of rectilinear and angular mo vements to be imparted to thework feed; ing; device in operating upon different portions 0 f;the:work-piece. 7 a 9;. In a-machin-e for operating upon; sheet-material having a tool movable over; the-surfaceof awork piece, thecombinationof a work support, a work clamping device, a slide memberto support said device, means to operate said slide mem:

her tocause saidclamping, deviceto shift the workpiece over the work support between, successiveoperating movements of the, tool, anda control memberfor the clamping device to cause the latter to shift, the work piece a predetermined distance in a directly lateral direction and sub sequently step by step; rotatably about a -cen er in oneportion of; the sheet material.

10. In a machine for operating-upon sheet ma.- terial having a tool movable overthe surface of a er ri c it e m in tion of. a. suppo a work engaging-device movable to'shift, the work 1 piece onvthe work support'betwee'n successive operatingmovementsof the tool, and a control member, forthework-engaging device whereby thelatter is operated to, shift the work piece in a directly lateral direction and subsequently step by step rotatably about a center in one portion of I the sheet material, said control inembercomprising a rotary disk orwheel having-its opposite surfaces provided with grooves to-serve as control surfaces for the work clamping device.

'11.' In a machine for operating upon'sheet material having a tool'movableovcr the surface'of a work piece-the combination of a work support, a work clamping device movable to shift the work:

piece on the work support between successive operatin movements of the -too1;;mea ns for'movingthe-work clamping device back and forth in directly lateral directions to effect step by step feeding ofthe work piece in a rectilinear'direc tion, other means for shifting the work clamping device rotatably in reverse directions whereby the work piece is shifted step bys tep about a given center, and a control member operative to determine the time of operationof; both said means whereby the work piece is shifted a predetermined numbersof times in a sidewise direction and then rotatably fora predetermined number of times in another direction.

12. In a machine for operating upon sheet material-having a tool-movable over the surface of a work piece, the combination of 'a work feeding awork piece, the combination of a work support,

a work engaging device movable to shift the work piece on the: worksupport between successive operating movements of the tool, fluid-operated means for operating thework-engaging device to effect movement of the workpiece in lateral di- 1 rections and also rotatively aboutacenter inthe work piece, andcontrol mechanism for the fluidoperated means'to determine the number and the sequence of the lateral-movements and of the ro- 1 tative-movementsof thework piece by said work engaging device. r r

114 Ina machine'for operating upon sheetm aterial having a tool movable over the surface of a work piece, the combination of a work feeding device movableto shift the workpiece between successive operating movements of the tool, fluidoperated means for operating the-work feeding device to effect movement of the work piece in directly'lateraldirections, asecond fluid-operated meansto effect rotative movement of the work feeding device, and means for starting said fluidoperated means in operation in predetermined 7 time sequenca 15'. In a, machine foroperating upon sheet material having a tool -movable', over" the surface of s device to effect movement of the work piece in -directlvrlateraldirections,a second fluid-operate .i-meansnto 'eflect} rotative movement.-

fluid-operated means; tolcausej said;jwo k device. to rotate ,the worlr; piece through redetermined-angle latter ethezt wo kt piece ha. movedin each lateral direction to- *mined extent. I a

'16., In amachine fojr olie iatj ng. upon t rialrhavm a tool" movable over;

workpiece. tth'e'ccombinationj i a;

. 'a. work engaging device movable toshift piece on the: work support between sucoe ive;

op ra d a i the; tool terifilhaving altool movable ove surface 0 work piece, the; combination or work so piece to rotate the workpiecestepbv stepabout said center, and a member operative to control both of saidnieans toprovide a dwell vin the piece over the rface of the work support be tween successi peratingmovements of the tool,

"I 1 means for efifectin'g niovem'entof the work clamping device back and-forthtqfeed ,thework piece a predetermined number of steps in "9, adirectl'y lateral ,direction,fmeans for operating the work" clamping device rotatively in reverse directions to o engage and feed the work piece rotatably for a e predetermined number of stepsabout a centerin ;said work piece, and a. controlmember having surfaces tocontrol both oisaid means, one'portion 01 said controlling uriace being operativeto 1 provide a dwell in the operation of one of said gmeanswhile the other is operating.

20,1119, machine, for operating upon sheet ma Uni-eel an 1P f e passageways on the other sidesv of the diskftw hereby a groove on one gside" of the control member provides for a dwell ineither the lateral or the rotative steps of the work engaging device while the group of passag eways on the other sideoi the \disk is efiectiveto provide either a rotativef or lateral Jseriesof steps [of the work, engagi he s r 'i deviee.

p 23. In a machine for operating upon sheetrna terial. havinga tool movableover the surface of a'work piece, the combinatio n of a workclan pa. r

and subsequently to release it, means operating in timed relation to the first-mentioned means 1 formoving the work "clamping device back and forth in directly lateral directionsjand subsequently rotatably about a given'e'enter in, the work piece to efiect feeding of the work piece stepbyrstep, and a rotary control member in the for-moi a disk having its opposite surfaces provided with controlling grooves arranged in alternation with a seriesofijpassageways efiective to produce movements of the work clampingdevice ,1 O I f: p qfilit h i-lei e 1 d fi ii f arid: efi si'qe f' the disk having-it's; grooves aridgroups :of passageways arranged in alternation with'respeot to-thegrooves and groups of passageways *on' the: other sides of'the' diskwherebya groove on one sideof the disk provides for a :dweliin 'eitherthe Iatera1-or the rotativesteps ofthe clamping devicevwhile'ai group of passagewayso'n T the other 'Zside'iof the "disk is effective to provide work clamping device, g

terial' havirrg a tool 'mo'vab le along apath on] the "'sttrfaceofga' workpiece; thecombination of work "of-said tool Qsaicl devices including; upper-and a lower clamping members for engaging opposite surfaces of the workpiece for substantial dis j-means for causing the'cl ampingmembers to engage'a; workpiece onopposite surfaces thereof, means foreaflsing the upper andlowerciam ing members to-move relatively away fromeachother in adirectiv lateral Y dire'ctiontcr engage another v portion-of-the'work piece and thento metre-"back engages aportion :ofthe work piece betweeirsaid "clamping device'scand-then moves alongesaid' in. a direction away from the devices.

tionof work clamping *qevicesjspacedfrom each other a distance corresponding substantially to opposite surfaces of the work piece, means n for "causing th'e clamping members to engage a Work we move relatively away froiii ieafch' other to re; 'iease'the work piece and-their tomove as a unit in a -di rect1y lateral" direction to. engage another "'eithera --rotat-i-ve or laterai series of steps 'ofthe clamping devices "spaced from each other a'disa f tan'ce corresponding substantially to the width tance along eaehside of the path of the tool,

' fate release the work piece and tomove asa unit agairr to place a Iresh-portion f the WOI'K pieoe in position for treatment by said tool; and means 7 :including said." clamping devices for holding the work piece against 'displaceme'ntvvhil e the tool ZEz'Qin a-ma hine for-operating up'on heet n a- 'terialhavin'g' a tool movalole back arid.- forth abovethe'surfaw of a workpiece; the co'mbiria- 7 thewidthof said tool; sai'd devi'gies including upperand lower clamping members for engaging 7 portionef -thew'ork piece we" thento move teak 'againato place a fresh portion ofthe' worle p'iece imposition fortreatment bysaid tool; and mearis automatically 'operative in timed lr-el'ation 'te all eaiq means to produce apredetermined number of straight-line back and iorth? shifting sof the work clamping devices to feed the work piece between successive operations of the tool and subsequently to eifeetirotative shiftingse f the achinje: for operating upon sheetmaa cont-r01 member is provided t 'onIythe-numberof straight-line a gircitative -shfftings'; of the; work clamping fee'd I also the sequeneeao-f the twoit 27 1a a machifi'e opera upens'heetina terfal" having a tool movablealternate-1y "idle 'workclamping fdevices 1 about 'a giver-r center-in ;the-work piece toposition'the lattezg'for-successive treatments "of other-portions'ro -saii work fpieee;

26.1% machine according device but es :of shiftings.="'

andoperative etrokes over-the surface of a work piece the combination o f workfcl'ampirig devices "spaced fromeach other distance correspondihg substantially to the? width: of: said too-1 said.

path

devices mending upper and ewer cla'mpin' "members-fer ene ir'igopposite suriaces of tr e 1 work piece; means'for "causing the clamping mer her-s to engage a tvprkpieceon epposite surfiaces thereof, Said workclamping"deVicesbeing moV able away-from eaeh other to p-la'ce abortig'nof the "work pieceu'nfie'r tension pm to the epe fa tion off the; tool; thereon, meansfor'eau'sing the upper-and rower elainpihg member's' tofni'ove' rel"- atively away from eachetheito vrelease' the-work piece and to'move as a unit in aIatera L direction I to engage ano-ther po ion of the Work piece and then tofiiove back agaih toplaee a fresh poritioh of the work pieceiin-poeitionfor treatment by' "said tool; and means eperatmgm timed relation ipieoe on-opposit'e surfaces 'thereoff means for e causing the upper and lower 'c'iamping members f to said means tofproduce' 'a'fpreietermihed humber of straight [hire .ifateral- 's'hiftings' of the werk clamping device's-t0 f ed} t e; w re pi c -between successive operations of the tool-- and then *to efieetf'retative shifti gsjof-the workclamping d g.

"Vices about a giver}; center in thfworkpiece to 1 position the latterfi-or successive treatments of otherportionso fsaid'workpiece. v 

